Knockdown corner locking paper container



Aug: 30, .1932. E. s( GOMES KNOCKDOWN CORNER LOCKING PAPER CONTAINER 2Sheets-Sheet 1 Filed March 7, 1950 ATTORNEY? as. GOMES 1,874,702KNOCKDOWN CORNER LOCKING PAPER conml m m I 1 Aug. 3o, 1932.

f Filed March 7, 1930 2 Sheets-Sheet 2 R m. m y .1 o a ATTbRNEY8Patented Aug. 30, 1932 UNITED STATES man s. GOMES, or. cr'ncrnimrri'fonro KNOGKDOWN CORNER LOCKING PAPER CONTAINER Application filedMarch 7,

My invention relates to a novel locking corner for a knock down papercontainer made from a sheet of cut and scored paper or fiber. Among theobjects of my invention are the a provision of a folding box made jfromcut and scored blanks in which there is provided an unusually rigidcorner lock. 7 Another object is the provision of a locking tongueadapted to engage a slot in which the tongue will extend in suchdirection that similarly constructed covers and bodies will telescopeone within the other without the tabs tending to be torn off ordisaligned.

A further object of my invention is the provision of a box or containerin which a triple ply layer of material is provided at the corners andin which the exterior surface of the cover or body is free from anyprojecting edges which might cause the covers and 90 bodies to catchwhen they are being put together. 7

Another object of my invention is the provision of a lock cornerstructure for a paper box which will be extremely simple to set up andin which the locking tongue extends so that it engages a slot on'one ofthe end flaps which extends in alignment with the top and bottom of thebox so that the box structure is not weakened by the structure of thelocking flaps. The above and other objects to which reference will bemade in the ensuing disclosure, I accomplish by that certain combinationand arrangement of parts of which I have shown a preferred embodiment.

Referring to the drawingsi Figure 1 is a plan view of the blank. 7 a

Figure 2 is a perspective view of a locking corner at the start of thefolding over operation.

Figure 3 is a perspective view of the corner and a further advancedstage of folding them is shown in Figure 3.

Figure 4 is a perspective view of a corner after it has been folded.

Referring first to the blank, I have shown a bodyportion 1 with endclosure flaps 2, 3. The end closure flaps fold inwardly so that flap 3lies inwardly in the box with reference to the flap 2 which forms theouter surface container edges of which tendto seat in thescored surfaceof the flapsQ aIIdjt-he adjacent surface are extendedvby means ofinserting-the finger 1930. Serial No. 433,923.

ofthe doublefolded box edge. The flaps 3 have locking flap sflat eachend edge which extend beyond the main body ofthe locking flaps. I havefurther provided slots 5 in each of the end flaps 4 which serve toretain the locking tongues to" be hereinafter described. The flaps 2 arejoined to the body l by means of scored'areas ad and the flaps 3 arearticulated to the flaps 2 by meansof o 1 scored areas b-b. The lockingflaps flare 50 articulated to the flaps means of scored areas 0-0. Theside walls of the container are preferably formed with single thicknessfiapslfi which have lock corner reinforcing flaps 7: articulated theretoby means of scored areas 03-03. The flaps 6 are articulated to the mainbody by means of scored areas see.

\Lockingvtongues 8 having lines ofarticulation ff extending parallelwith the side edges of'the containerareprovided so that to when thecorners, are folded overin a lock cornerformation, the ,tongues8 willengage a the slots 5. a v v p Referring to Figures 2, 3 and 4, infolding thebox, the side walls 6 are first folded up to form arightangle with the main body of the container. The lockingflaps 7 arethen folded inwardly at alright angle both to the fiap 6 to which theyare articulated and to thebody l the angles of course being in differentplanes. The end walls 2 are next fold ed ata right angle to the body 1and into surface contact with the locking flaps 7, the lower areas a a.

I The flaps 3 are then folded inwardly so as to lie parallel and insurface contact with the inner surface of theljflapsZ. Also re tainingthe locking flaps 7 between the inner of the flaps-3. a f 1 a i Theflaps are then folded in at an angle to the side and endwalls and thetongues, 8

against the outer surface of the tongues into theslots;5.;vAfter'thetongues 8 are insertedin the slots 5; the flaps 4 are pressedback into contact with the inner surface of the side flaps 6.

After the container has been assembled in the manner which has just beendescribed, the assembly is ready for use either as a box body or as abox cover in the well known manner of such constructions of which therehas been considerable development in the manufacture of such containersas are used for clothing boxes; All the advantages such as are providedby this type of box are inherent in my construction with theotheradvantagesvsuch as the three ply thickness of material extending atthe corners of the endsjof the boxand the two ply layers at the cornersof the sides of the box. The scored areasatth'e base of the lockingtongues bear against the edges of the slots whichfa's have been notedextend parallel with the bottom and top of the'container. The lockingtongues fit snugly against the inner surfaces of'the flaps 4 so- 2f;thatthere is no tendency when a cover is collapsed within a box body forthe tongues or slots to catch and tear off. The outer surfaces of theside wall 6 will be substantially smooth so that it presents a neatappearance, andhas no jutting tongues which tially as described.

are liable to catch in the use of the containe'r. I 7 V I While I haveparticularly described my inventi'onwithfreferenceto the side and endif) walls in the blanks and containers illustrated,

' it will be obvious that a similar lock corner may be provided were thedimensions of the box to be changed and the single thickness of materialextend along the ends instead of along the sides of the box. Suchmechan= ical modification would obviously be within the scope of myinvention which as has been noted particularly relates to the lockingf'ea ture of my corner construction.

40 Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is V In a knocked down paper box of the classwherein a fiat body has upstanding opposite side and end walls, the endwalls being provided with inwardly folding flapsa'nd each side wallhaving reinforcing flaps at its ends and wherein each folding flap hasshort locking' flaps at its ends characterized by the fact that each ofsaid locking flaps is provided with an elongated slot, each of said sideWalls provided with a pair of locking tongues receivable Within saidslots when said box is 1 set up, the said tonguesbeing furthercharacterized by the fact that they are articulated parallel with theouter edge of said side walls so that when they are folded in adirection towards said flat body they are prevented from being torn olfor disaligned substan- EARL S. GOMES.

